In the rich text editor:
@Trickychan
In a comment:
[Trickychan](https://chowlings.com/user/Trickychan)
For Names and Avatars:
In the rich text editor:
%Trickychan
In a comment:
[![Trickychan's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/Trickychan) [Trickychan](https://chowlings.com/user/Trickychan)